Hydraulic drive



A. FIDDL'ER t' HYDRAULIC; DRIVE f July 2, 1946.v

Filed Feb. l29, 19.44 2 sheets-sheet 1 V u *ALW .x 7.. /fqa w 0 \f 2 \2 L 54|, 1L., 4 1.. m. g 4 4.

lingala A INVENTOR.

H7701? me XS.'

July 2, 1946.

HYDRAULIC DRIVE 2- sheets-snaai 2 Patented July 2, 194

lmmnAULIc DRIVE Albert A. Fiddler, Renton, Wash., assignor of onehali to George K. Huil', Renton, Wash.

Application February 29, 1944, serial No. 524,501

' 7 Claims.

' 1 The device forming the subject matter of this application is adapted to be used to govern the movement of any desired part, for example, the butterfly valve of an internal combustion engine, through the instrumentality of relatively rotatable parts, actuating and actuated by a liquid -contained in a casing. p

The invention aims to supply novel means for producing the desired movement in the governing l part, to supply novel means for varying thaty movement at the will of an operator, and toV furnish novel means whereby oil`leakage will be avoided.

The device is capable of many uses vother than in connection with an internal combustion engine, as those skilled in the art will understand readily.

It is within th'e province of theV disclosure to improve generally and to enhance the utility of devices of that type to which the present invention appertains.

With the above and other objects in view, which `will appear as the description proceeds, the inf vention resides in th'e combination and arrangement of parts and inthe details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment respectively, on the lines 3 3, 4 4, 5 5 and 6 6 of Fig. 2, it beingpresupposed'that the observer is looking in a direction of the arrows in that figure;

Fig. 'l is a section on the line 'I I of Fig. 6; 1 Fig. 8 is a circumferential section taken through one of the guards and adjacent parts.

In carrying out the invention, there is provided a xed cylindrical casing I, preferably provided with' an integral end wall y2 and with a, detachyable end wall 3.` The end wall 2 carries a gland and may be rotated by any appropriate means,

indicated conventionally at 1. A driven or gove'r'noi' shaft 8 is mounted to rockin the gland 5.

, Anrarm Ilis` secured to th'shaft .8, for adjifist-v l l "x'heitcircumferentially' of that shaft, and is ad- 55 ports 32 therethrough. The ports 32 areV covered .iustably pivoted, as indicated at I0, to a connecting rod II or its equivalent. A counterweight I2 is adjustable longitudinally of the rod II, and is held in adjusted positions by a set screw I4 or the like.

The device forming the subject matter of this application may be used for various purposes, but in Fig. 1 there is shown a portion I 5 of the manifold of an internal combustion engine, a valve shaft I6 being mounted to rock in the manifold. To the shaft I6 is attached an arm I1, which is pivoted at |8 to the connection Il.

An impeller I9 is secured to theshaft 6, and an impeller 20 is secured to the shaft 8. Each impeller comprises a platellike body 2|, the area of which is substantially equal to the cross section of the interior of the casing I, and radial, laterally projecting varies 22 carried by the body. The vanes 22 of the impellers I9 and 20 project toward each other. In its periphery, each of the impeller bodies 2| is supplied with transverse y notches 23, each of the notches being located,

y 4 ,and the end wall 3 is provided with agland 5. y A driving shaft 6 is journaled in the gland4 sealing device.y

pzreferably, midway between two adjoining vanes A liquid, such as oil, not shown in therdrawings, is contained within the casing I, and may be introduced thereinto upon removal of a closure screw 24, carried by the casing.

The shaft 8 has longitudina1 movement in the gland 5, as well as rotation therein. The longitudinal movement of the shaft' enables the impeller 20 to be spaced at different distances vfrom the impeller I9, and, thus, th'e effect produced on the impeller I9 by the impeller 20 may be varied. The movement of the impeller 20 and the shaft 8 to the right in Fig. 2 is governed by a stop, which is adjustable, the stop preferably embodying a screw 25, threaded into th'eend wall 3 and heldin place by a lock nut 26. A ball-2| is mounted to rotate in the inner end' of the screw`25, and forms an anti-friction element, for engagement with the body 2| of the impeller 20.

AClosely adjacent to the end wall 2 of the casing is disposed'a sealing device 28. The sealing device 28 lits closely but rotatably inthe casing I. The sealing device 28 comprisesa semicircular part 29 and a semi-circular part I3U.

The semi-circularpart 28 is of hollow construction, but the semi-circular part 30 is preferably of plate-like form. The parts 29 and 30 of the sealing device 28 are pivotally connected, as shown at 3|, adjacent to the' periphery ofthe Near as periphery, the 'sealing aevicefzspnas' are omitted L' ,i

by guards v3.3 which open circumferentially of the shaft 6. A retractile spring 34 is located in the part 29 of the sealing device 28, one end of the springrbeing anchored at 35 to the part 29, the opposite end of the spring being anchored at 36 on the edge of the part 38. VThe sealing device 28 grips the shaft 6 .and rotates therewith. 'I'he guards 33 are placed on the inner surface of the sealing device ,28, that is, upon the surface which faces the impeller I9.

Adjacent to the end wall 3 of the casing I is located a sealing device 31. The sealing device 31 is constructed much like the sealing device 28 and parts hereinbefore described have been designated by numerals already used, the numerals being primed.

The sealing device 31 does not rotatewith the shaft 8, the shaft having longitudinal movement with respect to the said sealing device. vThe sealing device 31 is provided with an opening 38, through which the adjustingscrew 25 passes. The sealing device 31 maybe held againstrotation by any desired means vsupplemental to the screw 25. 'For example, a wedge retainer 39 may be introduced through the wall of the Vcasing I, into engagement with the sealing device. 'The sealing device V31 is not provided with the .ports '32 and the guards 33 of the sealing device 28.

In practical operation, when the shaft yI5 and the impeller I9 .are rotated, there is a reversed flow of oil or other liquid in the casing I, ..be'

tween the impeller I9 and the sealing device 28, asshown by the arrows to the left of the im- .peller I9 in Fig. 2. There is also'a circulation of the oil in the direction of the impeller 29,

The device forming the subject matter of this application is simple in construction but will be found thoroughly advantageous Vfor the ends in view and set out hereinbefore.

Having thus described the invention, what is claimed is:

1. In a hydraulic drive, a casing, a driving shaft journaled in the casing, a driven shaft mounted for rocking movement in thencasing, and

Y ator for limiting the longitudinal movement of 4the governor shaftin a direction away from the driving shaft, the area of each impeller being motion is imparted to the valve shaft `II or other Y part by the connecting rod II and the arm I1. The weight I2 acts'asa counterpoise, offsetting theVK torque on Vthe shaft 8 to a considerable extent.

The .governing effect produced by the impeller 20 may be regulated .by moving the screw 25 longitudinally, the ball 21 having a bearing against the body 2| of the impeller 20. The notches Z3 in .the bodies 2| of the mpellers I9 and 29 ytend to relieve excessive pressures which may be created in the casing I, due .to .operation at excessive speed. y

The guards 33 are connected along their for- Ward ends and along their sides to the :sealing device 28, but are open .at their rear ends' tends to draw through 4the ports `32` any liquid.,

g Y H6I) Thus there is created -within the guards 33"4 which may leak to the left of the sealing device 28, and such liquid -Will be returned through the ports 32 to .the space between the .sealing device 2,8 and the irnpeller I9.

The sealing device 31 .tends topreventoil from leaking about .the .shaft -8into .the spaceA .be-'i tween that impellerl and the .end wall 3.But, since the impeller 31 does not rotate,".thef,ports 32 and the scoops 33 of the sealing `:device '28 substantially equal to the internal cross section of the casing, eachimpeller having circumferentially spaced pressure-relief openings therethrough, the openings being disposed closely adjacent to the inner surface of the casing.

2. In ahydraulic drive, a casing, a driving shaft journaled in the casing, a driven shaft mounted for rocking movement inthe casing,-and for lon-A gitudinal sliding -movement therein, toward and away from the driving shaft, opposed impellers carried by the shafts and located inthe casing, and means under the control of an operator for limiting the longitudinal movement of the governor shaft in a direction away 1from the driving shaft, each impeller comprising adisk-l-like body and vanes `projecting laterally from the body, the

vanes of one impell'er projecting toward the vanes of the other impeller, the Ybody of each Vimpeller Abeing supplied with circumferentially spaced pressure-relief openings therethrough,. each opening being disposed approximately midvla'y`between two adjoining vanes.

Vv3. Ina hydraulic drive, laliixe'dcasin'gya driv` Y, the casing, the sealing member .fitting closely'but rotatably/in the casing and having .circumferentially spaced transverse ports therethrough, guards on that surface of the .sealing member which is Adisposed-toward .the impeller of .the

driving shaft, .each guard being extendedaboutY one of the ports, each guard opening at one-,end `in a direction counter to that in 'which .thedriving shaft is rotatedfhe Vguards. ,constituting means for creating suction Ain .the ports .to with-v draw .liquidwhich may have leakedinto the `space between the sealingl member rand said one -end `'ofthe casing, and means for imparting rotation ,to the driving shaftrin the direction stated,

fl. Ahydraulicdrive constructed as set forth in claim 3, and wherein the sealing member .comprises Vapproximately semi-circular parts, .a pivotal connectionbetween said parts, .and a retractile connection between said parts'and causing them togrip the driving shaft. l

5. vA hydraulic .drive constructed as set .forth Y in claim 3, Yand wherein the sealing membercompri-ses 'approximately vsemi-circular parts, a YpivotalV connection betweensaid partsand aretractile connection between said :.partsland causing themrto grip the .driving shaft, one o'f''said parts Ybeing hollow, the retractile connection being yhoused therein, the connectionibeing anchoredlto one .edgeof the other of said parts. Y Y .16.' A hydraulic *drive comprising 1a nxedgcylindrical casing, a driving shaft journaled in one end of the casing, a driven shaft mounted rotatably in the opposite end of the casing and for longitudinal movement therein, impellers in the casing and secured to the shafts, a iirst sealing member disposed closely adjacent t0 said Vone end of the casing and connected to the driving shaft for rotation therewith, a second sealingl member disposed closely to said opposite end of the casing, both sealing members conforming in area to the internal cross section of the casing,

vthe driven shaft passing movably through the second sealing member, means for xing the second lsealing member against movement with the driven shaft, and means under the control of an operator for limiting the longitudinal move- 'ment of the driven shaft toward and away from the driving shaft, said means passing adjustably through the second sealing member.

7. A hydraulic drive constructed as set forth lin claim 6, and wherein each sealing member 

